87

This number is a composite.

Single Curio View: (Seek other curios for this number)

87 = 3 * 29, and curiously 87² + 3² + 29² and 87² - 3² - 29² are primes. [Luhn]

Submitted: 2000-12-19 16:44:39; Last Modified: 2008-01-30 17:28:00.